#pragma once 

#define SIZE 4096
#define FLUSH_NONE 1
#define FLUSH_LINE (1<<1)
#define FLUSH_ALL  (1<<2)

typedef struct _myFILE
{
    int fileno;
    int flag;
    char buffer[SIZE];
    int end;
}myFILE;

extern myFILE*my_open(const char*path,const char*mode);
extern int my_fwrite(const char*s,int num,myFILE*stream);
extern int my_fflush(myFILE*stream);
extern int my_close(myFILE*stream);
